Solve for r
r=5
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-2r-\left(-1\right)=4r-29
To find the opposite of 2r-1, find the opposite of each term.
-2r+1=4r-29
The opposite of -1 is 1.
-2r+1-4r=-29
Subtract 4r from both sides.
-6r+1=-29
Combine -2r and -4r to get -6r.
-6r=-29-1
Subtract 1 from both sides.
-6r=-30
Subtract 1 from -29 to get -30.
r=\frac{-30}{-6}
Divide both sides by -6.
r=5
Divide -30 by -6 to get 5.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
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y = 3x + 4
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Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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